Merging v1.2 to dev-v2 + refactored clustering of modules

Conflicted merge of dev-v1 to dev-v2. Additionally improved folder structure and grouping of (sub)modules.

Non-Breaking Changes

• [control]:
  • Created dedicated doxygen-group for types
• [all modules]:
  • Improved doxygen representation and clustering into groups

Breaking Changes

• [core]:
  • Moved classes related to PlatformHelper to subfolder platform
• [curve]:
  • Clustered files into subfolders curves, splines and trajectories
• [io]:
  • Clustered files into subfolders joystick, logging, serialization and network
• [ode]:
  • Clustered files into subfolders integration and collocation